I don't think you should feel any fault. But at the same time understand that men can be predators.
Let me share a short story which is my best way to express what I mean to say.
17 I was rape (no need for details) After that I left the party scene, I guess as part of the trauma. Any way I was assualted several times after. I felt guilt for years. But the fact of the matter, I know I am more vulnerable then most, A giddy, 5.2, gullible young lady makes good prey. Let say I was a squirrel and one day I decided I wanted to be a lion. To do this I wanted to understand what I can do to become so, so I educate myself, because I can't force education on others, so I train in martial arts, because I cannot guarantee someone wont approach me with violence. I can't control other people but I make myself something other then prey.
I wish it could be different but its not. I hope this does not make you feel at fault in anyway I do not intend that. I suggest you talk to other professionals to decide whether you have the option to press charges or something else.
Another story to tell:
I known this guy for 3 years, I knew him from going on occasional small parties. I always go with my bf or a friend to keep an eye on me as a learned habit. He has made it clear that he was into me from the start but I let him know I was not interested and am in a relationship.
One day he invited me over to pick up some tools I needed and told his wife was there and we could all have a beer. I said sure, but I would have to hang out for a bit so I do not drive intoxicated (I do not recommend this, I know my body weight allows one drink before reaching the limit so I always wait just in case.) He said sure. When I get there he says the kids are asleep with his wife. So we drank by the car (first yellow flag), then he invites me in for a bit (red flag) but I figured I would be fine since I can defend myself now. One beer turned to two. And he started confessing he loved me. Which I thought was ridiculous so I asked "Are you sure you love me, or are your alternative motives getting the best of you?" He then gets angry, and tries to argue his case. Then he grabs me from behind and hold me tight. I used a technique I learned to push his arms out enough to slide under his arms, use my hips to push him back and turn quickly into fighting stance and I punch him in the rib (but not to hard because I was not sure what he was intending to do). I am sure I looked terrified but prepared. He looked like he felt bad, and tried to play it of as a joke, which may be. Either way I felt empowered. There were many things I should have seen as a threat, but now I feel less threatened and more free to hang out with male friends because I know I can defend myself.
Hope this helps and does not make you feel worst,[DOUBLEPOST=1400629910,1400629668][/DOUBLEPOST]Be patient and understanding with yourself. I am sorry you are dealing with this.